Connection Structure of Vehicle Body

ABSTRACT

A connection structure of a vehicle body includes a roof side rail member extending in a longitudinal direction of the vehicle body, a roof rear cross member extending in a transverse direction of the vehicle body, and having an end coupled to a rear end of the roof side rail member, a rear pillar member extending in a vertical direction of the vehicle body, and having an upper portion connected to the rear end of the roof side rail member and aligned with the end of the roof rear cross member, and a cover bracket covering a portion where the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member are connected to each other, the cover bracket configured to be integrated with the portion in a single body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Korean Patent Application No.10-2019-0162908, filed on Dec. 9, 2019, which application is herebyincorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates generally to a connection structure of avehicle body.

BACKGROUND

In the case of a conventional monocoque-type vehicle body, multiplecomponents are coupled to each other in a complex structure to constructa vehicle body. Shapes and coupling structures of the components aredifferent for each vehicle model.

Therefore, in order to construct a vehicle body of one vehicle model,multiple molds are required for the manufacture of components forconstructing the vehicle body. Furthermore, since the molds cannot beused in common to construct a vehicle body of another vehicle model,another group of molds should be manufactured.

As described above, in the case of manufacturing a vehicle bodyaccording to different assembly structures for each vehicle model andusing a plurality of components, workability is decreased.

The foregoing is intended merely to aid in the understanding of thebackground of the present disclosure, and is not intended to mean thatthe present disclosure falls within the purview of the related art thatis already known to those skilled in the art.

SUMMARY

The present disclosure relates generally to a connection structure of avehicle body. Particular embodiments relate to a connection structure ofan upper portion of a rear pillar (C pillar).

Accordingly, embodiments of the present disclosure provide a connectionstructure of a vehicle body, the connection structure being configuredsuch that a component corresponding to a rear pillar (C pillar) of avehicle may be easily assembled to a roof and a floor of the vehicle,and may be connected thereto with excellent strength and rigidity, whena modularized space frame vehicle body is constructed.

According to one embodiment of the present disclosure, there is provideda connection structure of a vehicle body. The connection structureincludes a roof side rail member extending in a longitudinal directionof the vehicle body, a roof rear cross member extending in a transversedirection of the vehicle body, and having an end coupled to a rear endof the roof side rail member, a rear pillar member extending in avertical direction of the vehicle body, and having an upper portionconnected to the rear end of the roof side rail member while beingaligned with the end of the roof rear cross member, and a cover bracketcovering a portion where the rear end of the roof side rail member, theend of the roof rear cross member, and the upper portion of the rearpillar member are connected to each other, the cover bracket to beintegrated with the portion in a single body.

The upper portion of the rear pillar member may be directly coupled andconnected to the rear end of the roof side rail member.

A structure in which the upper portion of the rear pillar member isdirectly coupled to the rear end of the roof side rail member may be astructure configured such that an upper end of the rear pillar membermay extend into a straight line shape along a longitudinal direction ofthe roof side rail member and an upper end surface thereof may bedirectly coupled to the rear end of the roof side rail member. Astructure in which the upper portion of the rear pillar member isdirectly coupled to the rear end of the roof side rail member may be astructure configured such that the upper end of the rear pillar membermay be provided as a reinforcement part that may be bent along thelongitudinal direction of the roof side rail member, and thereinforcement part may be coupled to the rear end of the roof side railmember in a surface contact manner.

When the upper portion of the rear pillar member is directly coupled tothe rear end of the roof side rail member, a first reference linepassing through a center of the connection structure along alongitudinal direction of the roof side rail member, a second referenceline passing through the center of the connection structure along alongitudinal direction of the roof rear cross member, and a thirdreference line passing through the center of the connection structurealong a longitudinal direction of the rear pillar member may beconnected together to meet at one point.

The upper portion of the rear pillar member may be connected to the rearend of the roof side rail member through the cover bracket while beingspaced apart from the rear end of the roof side rail member.

A structure in which the upper portion of the rear pillar member isconnected to the rear end of the roof side rail member through the coverbracket while being spaced apart from the rear end of the roof side railmember may be a structure configured such that an upper end of the rearpillar member extending into a straight line shape along a longitudinaldirection of the roof side rail member may be connected to the rear endof the roof side rail member through the cover bracket while beingspaced apart from the rear end of the roof side rail member. A structurein which the upper portion of the rear pillar member is connected to therear end of the roof side rail member through the cover bracket whilebeing spaced apart from the rear end of the roof side rail member may bea structure configured such that the upper end of the rear pillar membermay be provided as a reinforcement part that may be bent along thelongitudinal direction of the roof side rail member and thereinforcement part may be connected to the rear end of the roof siderail member through the cover bracket while being spaced apart from therear end of the roof side rail member.

The cover bracket may include a first cover bracket provided at aninside of the vehicle body to integrally cover the rear end of the roofside rail member, the end of the roof rear cross member, and the upperportion of the rear pillar member, a second cover bracket provided at anoutside of the vehicle body to integrally cover the rear end of the roofside rail member and the end of the roof rear cross member, and a thirdcover bracket provided at the outside of the vehicle body to integrallycover the rear end of the roof side rail member and the upper portion ofthe rear pillar member.

The second cover bracket and the third cover bracket may be coupled toeach other without a gap remaining therebetween, as the second coverbracket and the third cover bracket are in contact with each other atthe roof side rail member outside the vehicle body and are connected toeach other in a flat surface-contact manner.

The first cover bracket and the third cover bracket may be disposed tobe overlapped with each other, thus providing a flange part having apredetermined area. The flange part may be disposed at a portion betweenthe rear end of the roof side rail member and the upper portion of therear pillar member.

When a reinforcement part that may be bent along a longitudinaldirection of the roof side rail member is provided at an upper end ofthe rear pillar member, the flange part may be provided to integrallycover the reinforcement part.

According to an embodiment of the present disclosure, when a modularizedspace frame vehicle body is constructed, the rear pillar membercorresponding to a rear pillar (C pillar) of a vehicle can be easilyconnected to a roof and a floor of a vehicle body with an easy assemblyprocess and with excellent strength and rigidity. Accordingly, theconnection structure of embodiments of the present disclosure can securestronger coupling force, strength, and rigidity, and be improved indurability.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objectives, features, and other advantages of thepresent disclosure will be more clearly understood from the followingdetailed description when taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a view showing a modularized space frame vehicle body;

FIG. 2 is a view showing an upper portion of a rear pillar member, as aconnection structure of a vehicle body according to embodiments of thepresent disclosure;

FIG. 3 is a bottom perspective view of FIG. 2;

FIG. 4 is a view showing an embodiment in which a reinforcement partapplied to an upper end of a rear pillar member is directly coupled to aroof side rail member according to embodiments of the presentdisclosure;

FIG. 5 is a view showing a rear pillar member in a state where an upperend of the rear pillar member is spaced apart from a roof side railmember according to embodiments of the present disclosure;

FIG. 6 is a view showing an embodiment in which a reinforcement partapplied to an upper end of a rear pillar member is spaced apart from aroof side rail member according to embodiments of the presentdisclosure; and

FIGS. 7A-7C show embodiments in which the connection structure of avehicle body is applied to various vehicle body structures.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

Hereinbelow, a connection structure of a vehicle body according to anexemplary embodiment of the present disclosure will be described withreference to the accompanying drawings.

FIG. 1 is a view showing a modularized space frame vehicle body.Referring to FIG. 1, a floor assembly 109 includes a front apronassembly 101, a dash assembly 103, a center floor assembly 105, and arear floor assembly 107. An upper assembly 119 includes a side assembly111, a quarter assembly 113, a back assembly 115, and a roof carrier117. When the floor assembly 109 and the upper assembly 119 areassembled, a skin assembly 127, including a fender 121, a side-outer123, and a roof panel 125, is coupled thereto to construct the spaceframe vehicle body.

For reference, the above description of the drawing in FIG. 1 is onlyfor easy understanding of the configuration of the space frame vehiclebody mentioned in the present disclosure, and it does not represent anassembly order of compartments constituting an actual space framevehicle body. The actual assembly order may vary depending on varioussituations.

The roof carrier 117 includes roof side tubes 129, a cowl 131, middleroof rails 133, and a rear roof rail 135 that form a space framestructure. The roof side tubes 129 are at opposite sides of a vehicle,and the cowl 131, the middle roof rails 133, and the rear roof rail 135,which are provided between the roof side tubes 129 to connect the roofside tubes 129 to each other, are formed in a hollow closed tubestructure. As the roof side tubes 129 are expanded and contracted in alongitudinal direction of a vehicle body, and the cowl 131, the middleroof rails 133, and the rear roof rail 135 are expanded and contractedin a transverse direction of the vehicle body, the roof carrier 117 maybe easily transformed and applied to various vehicle types and variousvehicle models.

The front apron assembly 101, the dash assembly 103, the center floorassembly 105, and the rear floor assembly 107, which are modularized soas to form the floor assembly 109, are assembled by varying lengths orwidths thereof. Thus, the floor assembly 109 is easily transformed andapplied to various vehicle types and various vehicle models.

As the roof carrier 117 and the floor assembly 109 are transformed,other components may be assembled by adjusting shapes or sizes thereof.Accordingly, it is easy to develop a vehicle body suitable for a newtype or model of a vehicle, so that the development of the new vehicletype may be easy, and the vehicle body structure may be effectivelyapplied to small quantity batch production.

Meanwhile, the skin assembly 127 including the fender 121, theside-outer 123, and the roof panel 125 may be made of various materialssuch as carbon fiber reinforced plastics (CFRP) as well as conventionalsteel plastics. Thus, each shape of the components may be freelytransformed depending on vehicle types or vehicle models so as to beapplied to the above-described space frame, and various vehicles may beeasily manufactured.

The connection structure for a vehicle body may be configured to beapplied to the space frame vehicle body that has the above-describedconfiguration. As shown in the embodiment of FIGS. 2 and 3, theconnection structure for a vehicle body includes a roof side rail member10 extending in a longitudinal direction of a vehicle body, a roof rearcross member 20 extending in a transverse direction of the vehicle bodyand having an end coupled to a rear end of the roof side rail member 10,a rear pillar member 30 extending in a vertical direction of the vehiclebody and having an upper portion coupled to the rear end of the roofside rail member 10 while being aligned with the end of the roof rearcross member 20, and a cover bracket 40 formed in a plate, and coveringa portion where the rear end of the roof side rail member 10, the end ofthe roof rear cross member 20, and the upper portion of the rear pillarmember 30 are connected to each other, the cover bracket 40 to beintegrated with the portion in a single body.

That is, the roof side rail member 10 is interposed between the roofrear cross member 20 and the rear pillar member 30, and the roof rearcross member 20 and the rear pillar member 30 are connected at rightangles to the roof side rail member 10, respectively. Further, the coverbracket 40 covers and reinforces the portion where the rear end of theroof side rail member 10, the end of the roof rear cross member 20, andthe upper portion of the rear pillar member 30 are connected to eachother, thereby constructing the connection structure of a vehicle body.

The roof side rail member 10, the roof rear cross member 20, and therear pillar member 30 may all be formed as hollow tubes or pipes toconstruct the space frame structure.

In FIG. 1, the roof side rail member 10 may be a configurationcorresponding to the roof side tubes 129, and the roof rear cross member20 may be a configuration corresponding to the rear roof rail 135.

Further, the rear pillar member 30 may correspond to a component calleda C pillar or a rear pillar of a general vehicle.

As shown in FIG. 1, the rear pillar member 30 may be aligned andconnected to a portion at a rear end of the roof side tubes 129, e.g.,the portion to which the rear roof rail 135 is connected, and the coverbracket 40 may be coupled to the space frame structure to cover aconnected portion where the above-mentioned three components areconnected to each other.

In addition, the connection structure of a vehicle body may be used suchthat the rear pillar member 30 is coupled to an object such as the floorassembly 109 in FIG. 1.

That is, the connection structure may correspond to a structure in whicha lower end of the rear pillar member 30 is coupled to a rear end of aside sill that is positioned at the side of the floor assembly 109.

The floor assembly 109 as described above may be provided with a crossmember that is different from the above-mentioned component and formedin the transverse direction of the vehicle body. Accordingly, bycorresponding the cross member provided in the floor assembly 109 to therear roof rail 135 provided in the roof carrier 117 in FIG. 1, theconnection structure of a vehicle body in FIG. 2 may be used as the samestructure in which the rear pillar member 30 is coupled to the rear endof the side sill of the floor assembly 109, while only a direction ofthe connection structure is changed up and down.

Practically, embodiments of the present disclosure are expressed withthe concept including both when the rear pillar member 30 is coupled tothe rear end of the roof side tubes 129 and when coupled to the rear endof the side sill of the floor assembly 109, as described above. That is,the connection structure of a vehicle body of the present disclosure maybe commonly used in structures in which the rear pillar member 30 formedin the vertical direction of the vehicle body is coupled to both anupper side and a lower side of the vehicle body.

According to an embodiment of the present disclosure, the roof rearcross member 20 is disposed in the transverse direction of the vehiclebody perpendicular to the roof side rail member 10. The end of the roofrear cross member 20 is connected to the roof side rail member 10 in amanner of being directly coupled to the rear end of the roof side railmember 10.

Coupling between the roof rear cross member 20 and the roof side railmember 10 may be performed by welding, structural adhesives, or separatecoupling members.

As the end of the roof rear cross member 20 and the rear end of the roofside rail member 10 are directly coupled to each other, a coupledportion between the roof rear cross member 20 and the roof side railmember 10 may provide sufficient strength and rigidity.

According to an embodiment of the present disclosure, the rear pillarmember 30 is disposed at a right angle with respect to the roof siderail member 10 in the vertical direction of the vehicle body. The upperportion of the rear pillar member 30 may be directly coupled to the rearend of the roof side rail member 10 in a form in which the upper portionof the rear pillar member 30 is aligned with the end of the roof rearcross member 20.

Coupling between the rear pillar member 30 and the roof side rail member10 may be performed by welding, structural adhesives, or separatecoupling members.

As described above, a structure in which the upper portion of the rearpillar member 30 is directly coupled to the rear end of the roof siderail member 10 may be one of the following structures. That is, theremay be a structure in which an upper end of the rear pillar member 30extends into a straight line shape along a longitudinal direction of theroof side rail member 10 and an upper end surface thereof is directlycoupled to the rear end of the roof side rail member 10, as shown inFIG. 2. Alternatively, there may be a structure in which the upper endof the rear pillar member 30 is provided as a reinforcement part 31 thatis bent along the longitudinal direction of the roof side rail member 10and the reinforcement part 31 is coupled to the rear end of the roofside rail member 10 in a surface contact manner, as shown in FIG. 4.

When the upper end of the rear pillar member 30 is directly coupled tothe rear end of the roof side rail member 10 as shown in FIG. 2, or whenthe rear pillar member 30 is coupled to the rear end of the roof siderail member 10 through the reinforcement part 31 that is bent in an Lshape at the upper end of the rear pillar member 30, as shown in FIG. 4,the structure can provide sufficient strength and rigidity with respectto a coupled portion between the upper portion of the rear pillar member30 and the rear end of the roof side rail member 10.

As shown in FIGS. 2 and 4, in the case of the structure in which theupper portion of the rear pillar member 30 is directly coupled to therear end of the roof side rail member 10, a first reference line L1passing through a center of the connection structure along thelongitudinal direction of the roof side rail member 10, a secondreference line L2 passing through the center thereof along alongitudinal direction of the roof rear cross member 20, and a thirdreference line L3 passing through the center thereof along alongitudinal direction of the rear pillar member 30 are connectedtogether to meet at one point P1. Accordingly, the strength and rigidityof the coupled portion between the roof side rail member 10, the roofrear cross member 20, and the rear pillar member 30 may be increased,and in particular, the load may be properly distributed in variousdirections, thus improving the durability.

That is, the roof side rail member 10, the roof rear cross member 20,and the rear pillar member 30 are connected together, so that one end ofthe second reference line L2 and one end of the third reference line L3meet at the point P1 with the first reference line L1.

As another embodiment, the structure may be configured such that theupper portion of the rear pillar member 30 may be spaced apart from theroof side rail member 10 in an arrangement of being aligned with the endof the roof rear cross member 20. At this point, the upper portion ofthe rear pillar member 30 may be connected to the roof side rail member10 through the cover bracket 40, as shown in FIGS. 5 and 6.

The structure in which the upper portion of the rear pillar member 30 isspaced apart from the roof side rail member 10 and connected theretothrough the cover bracket 40 is preferably applied to a structurerequiring low rigidity or a structure requiring medium rigidity, and inthis case, weight and manufacturing cost thereof may be reduced.

As described above, a structure in which the upper portion of the rearpillar member 30 is spaced apart from the rear end of the roof side railmember 10 and connected thereto through the cover bracket 40 may be oneof the following structures. There may be a structure in which the upperend of the rear pillar member 30 extending into a straight line shapealong the longitudinal direction of the roof side rail member 10 isspaced apart from the rear end of the roof side rail member 10 withhaving a predetermined gap G1 and connected thereto through the coverbracket 40, as shown in FIG. 5. Alternatively, there may be a structurein which the upper end of the rear pillar member 30 is provided as thereinforcement part 31 bent along the longitudinal direction of the roofside rail member 10, and the reinforcement part 31 is spaced apart fromthe rear end of the roof side rail member 10 with having a predeterminedgap G2 and connected thereto through the cover bracket 40, as shown inFIG. 6.

As shown in FIG. 5, the structure, which is configured such that theupper end of the rear pillar member 30 extending in the strength lineshape along the longitudinal direction of the roof side rail member 10is spaced apart from the rear end of the roof side rail member 10 by thepredetermined gap G1 and connected thereto through the cover bracket 40,is preferably applied to reduce weight and manufacturing cost in thestructure requiring low rigidity.

As shown in FIG. 6, the structure, which is configured such that thereinforcement part 31 that is bent in the L shape at the upper end ofthe rear pillar member 30 is spaced apart from the rear end of the roofside rail member 10 by the predetermined gap G2, and connected theretothrough the cover bracket 40, is preferably applied to reduce weight andmanufacturing cost in the structure requiring medium rigidity.

The structure provided with the reinforcement part 31 at the rear pillarmember 30 of FIG. 6 may secure relatively more strength and rigidity ofthe upper portion of the rear pillar member 30 than the structurewithout the reinforcement part 31 of FIG. 5.

The cover bracket 40 of an embodiment of the present disclosure includesa first cover bracket 41 provided at an inside of the vehicle body tointegrally cover the rear end of the roof side rail member 10, the endof the roof rear cross member 20, and the upper portion of the rearpillar member 30, a second cover bracket 42 provided at an outside ofthe vehicle body to integrally cover the rear end of the roof side railmember 10 and the end of the roof rear cross member 20, and a thirdcover bracket 43 provided at the outside of the vehicle body tointegrally cover the rear end of the roof side rail member 10 and theupper portion of the rear pillar member 30.

That is, the first cover bracket 41, the second cover bracket 42, andthe third cover bracket 43 provide support by covering connectedportions between the rear end of the roof side rail member 10, the endof the roof rear cross member 20, and the upper portion of the rearpillar member 30 at all directions in a surface-contact manner. Thus,the connected portions may provide sufficient strength and rigidity.

An outer edge of the second cover bracket 42 and an outer edge of thethird cover bracket 43 are in contact with each other at the roof siderail member 10 outside the vehicle body and are connected to each otherin a flat surface-contact manner. The second cover bracket 42 and thethird cover bracket 43 are coupled to each other without a gap remainingtherebetween. Accordingly, the second cover bracket 42 and the thirdcover bracket 43 may have a stronger coupling force.

The first cover bracket 41, the second cover bracket 42, and the thirdcover bracket 43 that form the cover bracket 40 may be coupled to theconnection structure by being fixed by welding or structural adhesives,when the first cover bracket 41, the second cover bracket 42, and thethird cover bracket 43 cover the connected portions where the end of theroof rear cross member 20, the upper portion of the rear pillar member30, and the rear end of the roof side rail member 10 are coupled to eachother.

The first cover bracket 41 and the third cover bracket 43 are disposedto be overlapped with each other, thus providing a flange part 44 thathas a predetermined area. The flange part 44 is configured to bedisposed at a portion between the rear end of the roof side rail member10 and the upper portion of the rear pillar member 30. Accordingly, theconnected portion between the rear end of the roof side rail member 10and the upper portion of the rear pillar member 30 may have improvedstrength and rigidity.

Further, the flange part 44 is provided to integrally cover thereinforcement part 31 that is bent along the longitudinal direction ofthe roof side rail member 10 at the upper end of the rear pillar member30. Thus, the reinforcement part 31 may provide sufficient couplingstrength and rigidity.

The connection structure of a vehicle body as described above isconfigured such that the vertical length of the rear pillar member 30may easily vary and be coupled to the rear end of the roof side railmember 10. Therefore, the connection structure may be easily applied tovarious structures of a vehicle body frame, as shown in FIGS. 7A-7C.

In FIGS. 7A-7C, various structures of a vehicle body frame are shown tobe comparable to each other. In each structure of a vehicle body frame,circles A1 and C1 indicate joints provided to form each vehicle bodyframe. Among the circles, opposite ends of a component corresponding tothe rear pillar member 30 of the present disclosure are indicated withsolid circles C1, and the above-described connection structure of avehicle body of the present disclosure may be applied to the solidcircles C1.

That is, the connection structure of a vehicle body may be easilyapplied in common to the various vehicle types as shown in FIGS. 7A-7C,when the length variation of the rear pillar member 30 and the slightdeformation are entailed. Accordingly, the development of new vehicletypes may be carried out easily, and it is possible to providetechnology infrastructure that may be effectively applied to smallquantity batch production.

Hereinbefore, according to an embodiment of the present disclosure, inconfiguring a vehicle body structure of a modularized space frame type,the rear pillar member 30 that corresponds to a rear pillar (C pillar)of a vehicle is coupled to a roof and a floor of a vehicle body witheasy assembly performance and excellent strength and rigidity.Accordingly, the connection structure can secure stronger couplingforce, strength, and rigidity, and be improved in durability.

Although preferred embodiments of the present disclosure have beendescribed for illustrative purposes, those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the inventionas disclosed in the accompanying claims.

What is claimed is:
 1. A connection structure of a vehicle body, theconnection structure comprising: a roof side rail member extending in alongitudinal direction of the vehicle body; a roof rear cross memberextending in a transverse direction of the vehicle body and having anend coupled to a rear end of the roof side rail member; a rear pillarmember extending in a vertical direction of the vehicle body and havingan upper portion connected to the rear end of the roof side rail memberand aligned with the end of the roof rear cross member; and a coverbracket covering a portion where the rear end of the roof side railmember, the end of the roof rear cross member, and the upper portion ofthe rear pillar member are connected to each other, the cover bracketconfigured to be integrated with the portion in a single body.
 2. Theconnection structure of claim 1, wherein the upper portion of the rearpillar member is directly coupled to the rear end of the roof side railmember.
 3. The connection structure of claim 2, wherein an upper end ofthe rear pillar member extends into a straight line shape along alongitudinal direction of the roof side rail member and an upper endsurface thereof is directly coupled to the rear end of the roof siderail member.
 4. The connection structure of claim 2, wherein an upperend of the rear pillar member includes a reinforcement part that is bentalong the longitudinal direction of the roof side rail member, andwherein the reinforcement part is coupled to the rear end of the roofside rail member in a surface contact manner.
 5. The connectionstructure of claim 2, wherein a first reference line passing through acenter of the connection structure along a longitudinal direction of theroof side rail member, a second reference line passing through thecenter of the connection structure along a longitudinal direction of theroof rear cross member, and a third reference line passing through thecenter of the connection structure along a longitudinal direction of therear pillar member are connected together to meet at one point.
 6. Theconnection structure of claim 1, wherein the upper portion of the rearpillar member is connected to the rear end of the roof side rail memberthrough the cover bracket while being spaced apart from the rear end ofthe roof side rail member.
 7. The connection structure of claim 6,wherein an upper end of the rear pillar member extending into a straightline shape along a longitudinal direction of the roof side rail memberis connected to the rear end of the roof side rail member through thecover bracket while being spaced apart from the rear end of the roofside rail member.
 8. The connection structure of claim 6, wherein anupper end of the rear pillar member is provided as a reinforcement partthat is bent along the longitudinal direction of the roof side railmember and the reinforcement part is connected to the rear end of theroof side rail member through the cover bracket while being spaced apartfrom the rear end of the roof side rail member.
 9. The connectionstructure of claim 1, wherein the cover bracket comprises: a first coverbracket provided at an inside of the vehicle body to integrally coverthe rear end of the roof side rail member, the end of the roof rearcross member, and the upper portion of the rear pillar member; a secondcover bracket provided at an outside of the vehicle body to integrallycover the rear end of the roof side rail member and the end of the roofrear cross member; and a third cover bracket provided at the outside ofthe vehicle body to integrally cover the rear end of the roof side railmember and the upper portion of the rear pillar member.
 10. Theconnection structure of claim 9, wherein the second cover bracket andthe third cover bracket are coupled to each other without a gap betweenthem.
 11. The connection structure of claim 10, wherein the second coverbracket and the third cover bracket are in contact with each other atthe roof side rail member outside the vehicle body and are connected toeach other in a flat surface-contact manner.
 12. The connectionstructure of claim 9, wherein the first cover bracket and the thirdcover bracket are disposed to be overlapped with each other to provide aflange part having a predetermined area; and the flange part is disposedat a region between the rear end of the roof side rail member and theupper portion of the rear pillar member.
 13. The connection structure ofclaim 12, wherein, when a reinforcement part that is bent along alongitudinal direction of the roof side rail member is provided at anupper end of the rear pillar member, the flange part is provided tointegrally cover the reinforcement part.
 14. A vehicle comprising: avehicle body; a roof side rail member extending in a longitudinaldirection of the vehicle body, the roof side rail member having a rearend; a roof rear cross member extending in a transverse direction of thevehicle body, the roof rear cross member having an end coupled to therear end of the roof side rail member; a rear pillar member extending ina vertical direction of the vehicle body, the rear pillar member alignedwith the end of the roof rear cross member and having an upper portioncoupled to the rear end of the roof side rail member; and a coverbracket covering a portion where the rear end of the roof side railmember, the end of the roof rear cross member, and the upper portion ofthe rear pillar member are connected to each other.
 15. The vehicle ofclaim 14, wherein the upper portion of the rear pillar member isdirectly coupled to the rear end of the roof side rail member.
 16. Thevehicle of claim 15, wherein an upper end of the rear pillar memberextends into a straight line shape along a longitudinal direction of theroof side rail member and an upper end surface thereof is directlycoupled to the rear end of the roof side rail member.
 17. The vehicle ofclaim 15, wherein an upper end of the rear pillar member includes areinforcement part that is bent along the longitudinal direction of theroof side rail member, and wherein the reinforcement part is coupled tothe rear end of the roof side rail member in a surface contact manner.18. The vehicle of claim 14, wherein the upper portion of the rearpillar member is connected to the rear end of the roof side rail memberthrough the cover bracket while being spaced apart from the rear end ofthe roof side rail member.
 19. The vehicle of claim 18, wherein an upperend of the rear pillar member extending into a straight line shape alonga longitudinal direction of the roof side rail member is connected tothe rear end of the roof side rail member through the cover bracketwhile being spaced apart from the rear end of the roof side rail member.20. The vehicle of claim 18, wherein an upper end of the rear pillarmember is provided as a reinforcement part that is bent along thelongitudinal direction of the roof side rail member, and wherein thereinforcement part is connected to the rear end of the roof side railmember through the cover bracket while being spaced apart from the rearend of the roof side rail member.